McLeod 75321 Street Extreme Clutch Kit, 11-Inch, 1-1/8 x 26 Spline

Product Description

McLeod 75321 is a Street Extreme clutch kit for a compatible GM manual-transmission build. Its 11-inch disc uses a 1-1/8-inch, 26-spline hub. Confirm those dimensions against the transmission actually installed in the vehicle, especially when working with a conversion or a restored car whose drivetrain may differ from the original specification.

The package combines ceramic friction material with a high-clamp-load diaphragm pressure plate. McLeod’s current specification table assigns this part a 600 HP rating. Treat that as manufacturer application guidance rather than a guarantee for every combination of engine output, tyres, vehicle weight and driving conditions.

A replacement clutch is also an opportunity to inspect the surrounding release system and flywheel. This kit does not include a flywheel, so plan the necessary inspection, machining or replacement before the transmission is removed. Correct preparation and adjustment help the new assembly work as intended.

Features & Benefits

• 11-inch single-disc configuration.
• 1-1/8-inch input-shaft diameter with 26 splines.
• Ceramic friction surfaces on both sides of the disc.
• High-clamp-load diaphragm pressure plate.
• Street Extreme series for performance street and track applications.
• Pilot bushing and alignment tool included; release bearing supplied as applicable to the kit.

Compatibility & Applications

McLeod identifies a 1955–1985 GM application family in its specification table. This is a starting point for selection, not blanket compatibility with every GM vehicle in that range. Verify engine, transmission, flywheel and release arrangement together.

Required selection dimensions are an 11-inch clutch and a 1-1/8 x 26-spline input. Confirm the pressure-plate mounting pattern, available bellhousing clearance and bearing geometry. Share the installed drivetrain details with MyTruckPoint when requesting a fitment check.

Installation, Use & Care

• Use a qualified drivetrain installer. Check disc fit on the input shaft and inspect bellhousing alignment, release linkage and bearing condition before assembly.
• Have a suitable flywheel professionally resurfaced and inspected, or replace it when necessary. Keep the friction surfaces clean and dry; correct any oil leak before fitting the clutch.
• Use the alignment tool, tighten fasteners progressively in the specified pattern and set release-system adjustment using the latest McLeod instructions. Do not use an impact wrench on the pressure-plate bolts.
• Complete 1,200–1,500 clutch engagement cycles in normal street driving before wide-open-throttle or dyno use. McLeod also describes roughly 500–750 miles of stop-and-go driving; highway distance alone does not provide the necessary cycles.